Valve-spring compressor



Sept. 25, 1928. 1,685,548

W. F.- HOUSLEY ET AL VALVE SPRING COMPRESSOR Filed Dec. 9, 1927 gwwnko p W////am F How/q Edward 61 Erma/70L f yaw.

durable Patented Sept. 25, 1928.

UNITED STATES WILLIAM r. HoUsLEY, or ANNAPOLIS PATE NT OFFICE.

PAROLE, MARYLAND.

VALVE-SPRIN G COMPRESSOR.

Application filed December This invention relates to a tool for compressing valve springs of internal combustion engines, andespecially that type of engine known as valve-in-head engine.

One object of this invention isto provide a tool which will exert sufi'icient pressure to compress a valve spring and to control the movement of the spring while being compressed and while being returned to its original position, all with a minimum of effort and skill on the part of the operator.

Another object is to construct a tool which will have a thrust or pressure along the longitudinal axis of the spring so that the spring will not be eccentrically loaded at any time, and thus cause the valve spring washer to bind on the valve stem, or cause the spring to slip sideways from under the engaging member with the resultant possibility of a broken spring or injury to the operator.

Another object is to provide a tool which will function without removing the cylinder head. In case of a broken spring, spring washer, or lock pin, it is not desirable to ave to removethe cylinder head in order to make the replacement.

A still further object of this invention is to provide a tool which will be of simple and construction, economical to manufacture, easy to operate, and compact and light enough to carry in a tool kit.

In carrying out our invention, we rovide a frame or bracket, one end of which is adapted to be secured to a member on top of the cylinder head, such as a rocker arm shaft bearing support. This can be readily accomplished through the stud on top of the rocker arm shaft bearing. By securing the frame in this manner, it may be swung over the adjacent valve on one side of the support, and then over the adjacent valve on the other side, and thus v worked upon without changing the frame from one support to another. The upper part of the frame extends out over the valve stem, and has a screw threaded opening therein with a valve spring washer en aging element on ing through said opening.

he proportions of the frame and the slot contained therein enable the operator to position the screw over the valve that a straight-line thrust may be obtained on the valve spring. The use of a stem so 9, 1927. Serial No. 238,899.-

screw enables the operator mechanically to control the movement of the valve spring and the screw is self-locking or holding so that both hands of the operator are free once the valve spring has been compressed. igure 1 isa side elevation of part of an overhead valve motor with the valve compressor in place to engage a valve spring.

Figure 2 is a side elevation of the tool.

Figure 3 is a plan view of the tool in place on a motor.

Figure 4is a plan sectional view of the valveaspring engaging member taken on line H of Fig. 2.

Referring to the drawings, 1 designates the upper part including the cylinder head of an engine of the"over head valve type, having the usual valves, valve stems 2, valve springs 3, for holding said valves to their seats, valve spring washers 4 engaging the tops of said SPIlIl s, passing through va ve stems with the cooperation of the washer to lock the spring and stem of each valve. The valves are actuated by rocker arms 6, which in turn are actuated by push rods 7 The rocker arms are mounted on a rocker arm shaft 8 which is supported in bearings 9 on bearing supports 10. The su ports in turn are rigidly secured to cy inder head 1 by bolts 30, nuts 11 and studs 12.

The valve spring compressor comprises a substantially Z-shaped frame or bracket which is made up of a vertical portion 16, a lower horizontal flange or foot 17, and an upper horizontal flange or head 18 extending from the other side of the vertical memher. The foot 17 is slotted at 19 to-allow stud 12 to pass therethrough and be adjusted longitudinally relative thereof. The head 18 has a threaded opening 20 adapted to receive screw 21. v f

The pressure producing element or screw 21 has a polygonal head 22 adapted to receive a wrench for the'purpose of rotating said screw and thereby move it through opening 20 in the head 18. securing means at the oppositeend comprising a reduced neck 23 and a locking washer 24 serves to'secure the engaging element 25, to the end of screw 21, so' that the end of the screw may freely rotate in the engaging ele- Inent. v

The spring washer engaging element 25 2 and serving valve spring and locking pins 5 1 bodily member 25 engages depending arms 27 attaching head 26 to ring 28.' Ring 28'is adapted to engage valve spring washer 4 and has an opening 29 large enough to allow valve stem 2 and looking pin 5 to pass therethrough when valve spring 3 is compressed. f In the operation of our invention, valve rockeri arm =6 is removed from its position above the valve as by sliding it along the rocker arm shaft orby removing the complete rocker arm assembly. After the removal of nutll'the frame 15 is positioned on support 10 so that stud 12 passes through slot 19. Nut 11 is replaced only tight enough to pivotally secure the frame to member 10. The frame is then adjusted sov that the valve spring washer on the spring which the operator desires to compress. By turning screw 21 the valve [Spring is compressed, and member 25"passes .own over valve stem Q'and lock pin'5. thereby relieved of spring be removed through the apertures between the depending arms '27. lhe springmay be held in this position until the valve is ground and the locking pin replaced, or it may lee-released and another valvespring compressed. c

After completing work upon the first spring, the other spring in the same cylinder may be operated upon by swingingframe 15 on stud 1221s a {pivot until member 25 lies directly 7 over the second valve spring washer. In this manner, and exhaust valve of any one cylinder'inay Lock pin-o5 is pressure andmay 'be operated upon without changing the frame from one supporting member, to

another. 5 I

To do not limit our invention-to all the details] of form and construction hereby described, since weare aware that the same is capable of modification or variation without departure from the spirit of our invention and within the scope of the appended claims. v f r I Obviously, the proportionsand shape of theframe 15'mayhave1to be changed to adopt our invention tomotors of different manufacturel" Head 22 may be equipped with a handle, for instance, by drilling a hole therethrough and putting a slidable bar therein. Valve spring washer engaging element 25 may take-a difierentform such as a Q-shaped frame'w ith arbifurcatedfoot member toengagethe washer; The means forse uring screw 21 to member 25' may be constructed to include an anti-friction hearing. These and like modifications'may be "made for commercial or economic reasons without departing from the fundamental deas embraced in our invention.

WVe cl'aHnF Q 1. A valve spring compressor compris:v

ried by both the inlet 7 spaced froni'said foot portion. a pressure devicecarriedby said head, and means on said device adapted to compress a valve spring. 2. A valve spring compressor comprising a bracket adapted to hesecured to an engine cylinderfhead while the latter is operatively assembled with the engine block. said bracket having a foot portion -Jformed for attachment to the engine head, ahead on sair bracket horizontally and vertically spaced fromsaid foot portion, a pressure screw carsaid head, and means on said screw adapted to compress avalve spring.

A valve spring compressor comprising a bracket adapted to besecured to an engine cylinder head while the latter operatively assembled with the engine block, said bracket having a foot portion formed for pivotal attachment to the engine head whereby to be swung from operative association with one valve to another, a head on said bracket horizontally and vertically spaced from said foot portion, a pressure device carried by said head, and means on said device adapted to compress-a valve spring.

I 4. A valve spring compressor rco nprising a bracket adapted to be securedto an engine cylinder head while the latter is operatively assembled with the engine block, said brackat having a foot portionformed for pivotal attachment to theengine head whereby to be swung from operative association with one valve to another, a heado'n said bracket horizontally and ver 'ically spaced from said foot portion and extending in the opposite direction from said foot portion, a pressure device carried by said head, and means on said device adapted to compress a valve spring.

' 5. A'valve spring compressor comprising abracket adapted to be securedto an engine cylinder head while the latter is operatively assembled with the engine block. said bracket having a foot portion formed for attachment to the engine head, a head on said bracket horizontally from said. foot portion and extending in the opposite direction from. said foot portion. a pressure device carried by'said head, and neans on said device adapted to compress a valve spring. 7 1 a 6'. 'A'valve spring compressor comprising a bracket adapted to be secured to an engine cylinder head while the latter isopera'tively assembledwith the engine block, said bracket having a foot portion-formed for pivotal attachmnt to the engine head, whereby to be swung from operative association with one valve=to another, a head on said bracket horizontally and vertically spaced from said foot and vertically spaced portion and extending in the opposite direcadapted to compress a valve spring, said tion from said foot portion, a pressure screw pressure screw being adapted when adjusted carried by said head, and means on said to retain a spring under compression. screw adapted to compress a valve spring. 11. A valve spring compressor comprising A valve spring compressor comprisinga a bracket having means whereby to secure bracket having a. horizontally disposed foot the same above a cylinder head when the portion formed with a stud receiving openlatter is assembled with the engine block, ing, whereby to be secured to the top of a an adjustable pressure producing element on cylinder head, said bracket having a vertisaid frame, and valve spring compressing cally disposed portion extending from said means on said pressure element, said elefoot and a head carried by said vertically ment and means being adapted, when ad disposed portion, said head being located on justcd, automatically to hold a spring under ,the opposite side of said vertical portion from compression. the foot, 3. pressure device carried by said 12. A valve spring compressor comprising head, and means on said pressure device a bracket having means whereby to secure adapted to compress a valve spring. the same above a cylinder head when the 8. valve spring compressor comprising latter is assembled with the engine block a bracket having a horizontally disposed saidbracket having a portion adapted to foot portion formed with a stud receiving extend above a valve spring, a pressure proopening, whereb to be secured to a cylinder ducing element on said bracket portion to head while the latter is assembled with an compress a valve spring and means for adengine block, said bracket having a vertijusting said pressure element adapted to cally disposed portion extending from said hold the same in any adjusted position foot and a head carried by said vertically whereby to automatically hold a spring undisposed portion, said head extending horider compression. zontally away from said vertically disposed 13. A valve spring compressor comprising portion, a pressure device carried by said a bracket having a portion adapted to be head, and means on said pressure device positioned immediately adjacent a valve adapted to compress a valve spring, said spring, a portion extending laterally from pressure device being adapted when adjusted said first mentioned portion and formed for to retain a spring under compression. attachment to a fixed part of a cylinder 9. A valve spring compressor comprising head while the latter is operatively assema bracket avmg a horizontally disposed bled with an engine block, an adjustable foot portion formed with a stud receiving pressure exerting device carried by said first opening, whereby to be secured to a cylinder portion of the bracket for compressing a head while the latter is assembled with an spring, said device being adapted to remain engine block, said bracket having a vertiset in adjusted position and automatically cally disposed portion extending from said to hold a spring under compression. foot and a head carried by said vertically 14QA valve spring compressor comprising disposed portion, said head extending horia bracket having a portion adapted to be zonta-lly in the opposite direction from the positioned immediately adjacent a valve foot, a pressure screw carried by said head, spring, a portion extending laterally from and means on said pressure screw adapted said first mentioned portion and formed for to compress a valve spring. attachment to a fixed part of a cylinder 10. A valve spring compressor comprising head while the latter is operatively assema bracket having a horizontally disposed bled with an engine block, an adjustable foot portion formed with a stud receiving pressure exerting device carried by said opening, whereby to besecured to a cylinder first portion of the bracket for compressing head while the latter is assembled with an a spring, said pressure device being adapted engine block, said bracket having a vertiwhen adjusted to retain a spring under comcally disposed portion extending from said pression. 'foot and a head carried by said verti In testimony whereof we have hereunto cally disposed portion, said head extending set our hands.

horizontally away from said vertically disposed portion, a pressure screw carried by WVILLIAM F. HOUSLEY. said head, and means on said pressure screw EIYWAR G. TOWNSEND. 

